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Coupled toroidal resonator based miniaturized differential band-pass filter

A ring resonator and band-pass filter technology, applied in resonators, waveguide devices, electrical components, etc., can solve the problems of unsatisfactory common mode rejection and large size of differential filters, and achieve steep edge selection characteristics, The effect of size reduction and high common mode rejection characteristics

Inactive Publication Date: 2015-02-25
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the common-mode rejection capability of the differential filter obtained in many previous studies is not ideal and its size is relatively large

Method used

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  • Coupled toroidal resonator based miniaturized differential band-pass filter
  • Coupled toroidal resonator based miniaturized differential band-pass filter
  • Coupled toroidal resonator based miniaturized differential band-pass filter

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Embodiment Construction

[0016] The invention discloses a miniaturized differential bandpass filter based on a coupled ring resonator. The differential filter includes two mutually coupled microstrip ring resonators and two loaded open-circuit terminal microstrip lines. The invention adopts a microstrip line design. The invention has the advantages of light weight, excellent performance, small size, low production cost, etc., and has broad application prospects for radars in various frequency bands, communication equipment and future high-speed wireless communications, especially with strict requirements on weight, performance, volume, etc. Response system.

[0017] Combine Figure 7 , The present invention is a miniaturized differential band-pass filter based on coupled ring resonators, including two mutually coupled ring resonators, each ring resonator is composed of four microstrip lines, and the four microstrip lines in the rectangular ring on the left These are the first microstrip line 1, the seco...

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Abstract

The invention provides a coupled toroidal resonator based miniaturized differential band-pass filter. The coupled toroidal resonator based miniaturized differential band-pass filter comprises two centrally-symmetrical mutually-coupled toroidal resonators, wherein each toroidal resonator comprises four micro-strip line combinations. The first toroidal resonator comprises a rectangular ring composed of a first micro-strip line, a second micro-strip line, a third micro-strip line and a fourth micro-strip line, a first output port and a second output port, wherein the first micro-strip line is located above the rectangular ring and is vertically symmetrical to the third micro-strip line, the second micro-strip line and the fourth micro-strip line are respectively located on the left side and right side of the first micro-strip line and are both connected with the first micro-strip line and the third micro-strip line, the first output port is connected with the first micro-strip line, and the second output port is connected with the third micro-strip line. The coupled toroidal resonator based miniaturized differential band-pass filter has lower difference mode pass band insertion loss, higher return loss, a steep edge selection characteristic and a higher common-mode rejection characteristic.

Description

Technical field [0001] The present invention relates to the technical field of microwave and millimeter waves, in particular to a miniaturized differential band pass filter based on a coupled ring resonator. Background technique [0002] The electromagnetic interference problem in wireless communication electronic equipment and medical equipment is gradually becoming serious. This problem is very serious and should not be ignored by medical organizations. There is evidence that errors in detection data or images caused by electromagnetic interference will cause doctors to make diagnoses that threaten the health and even life of patients. Therefore, the balanced circuit that can suppress noise, higher dynamic range and lower electromagnetic interference has attracted the attention of many organizations. For the differential mode excitation of the differential filter, it should have excellent out-of-band suppression and high selection characteristics. Lower insertion loss and bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 王辉傅军李伟超杨柳静杨怡蒋飞
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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